body {
    font-family: 'Roboto', sans-serif;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    background-color: #121212;
    color: #e0e0e0;
    padding: 20px;
}

#game-container, #skill-tree-container {
    background-color: #1e1e1e;
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.2);
    margin-bottom: 20px;
    width: 80%;
    max-width: 600px;
}

h1 {
    text-align: center;
    margin-bottom: 1rem;
    color: #edff00;
    text-shadow: 0 0 10px rgb(214 255 0 / 70%);
}

h2 {
    text-align: center;
    margin-bottom: 1rem;
    color: #da00ff;
    text-shadow: 0 0 10px rgb(229 0 255 / 70%);
}


button {
    font-size: 1.2rem;
    padding: 0.5rem 1rem;
    cursor: pointer;
    background-color: #003333;
    color: #00ffff;
    border: 2px solid #00ffff;
    border-radius: 5px;
    transition: all 0.3s;
    margin-top: 1rem;
    text-shadow: 0 0 5px rgba(0, 255, 255, 0.7);
    box-shadow: 0 0 10px rgba(0, 255, 255, 0.3);
}

button:hover {
    background-color: #004d4d;
    box-shadow: 0 0 15px rgba(0, 255, 255, 0.5);
}

button:disabled {
    background-color: #1a1a1a;
    border-color: #4d4d4d;
    color: #4d4d4d;
    cursor: not-allowed;
    box-shadow: none;
}

.hidden {
    display: none;
}

#result-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

#result-text {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    color: #00ffff;
}

#character-info {
    margin-bottom: 1rem;
    color: #00ffff;
}

#xp-bar-container {
    position: relative;
    width: 100%;
    height: 20px;
    background-color: #2a2a2a;
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 0.5rem;
    box-shadow: 0 0 10px rgba(0, 255, 255, 0.3);
}

#xp-bar {
    width: 0;
    height: 100%;
    background-color: #1eff00;
    transition: width 0.5s ease-in-out;
    box-shadow: 0 0 15px rgba(0, 255, 255, 0.7);
}

#so-close-overlay {
    position: absolute;
    right: 5px;
    top: 50%;
    transform: translateY(-50%);
    background-color: rgba(255, 255, 0, 0.2);
    color: #ffff00;
    padding: 2px 5px;
    border-radius: 3px;
    font-size: 0.8em;
    font-weight: bold;
    opacity: 0;
    transition: opacity 0.3s ease-in-out;
    text-shadow: 0 0 5px rgba(255, 255, 0, 0.7);
}

#so-close-overlay.visible {
    opacity: 1;
}

#skill-tree {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}

.skill-branch {
    width: 48%;
    margin-bottom: 1rem;
}

.skill-list {
    display: flex;
    flex-direction: column;
}

.skill-button {
    margin: 0.25rem 0;
    padding: 0.5rem;
    font-size: 0.9rem;
    text-align: left;
    background-color: #2a2a2a;
    color: #ff00e9;
    border: 1px solid #ed00ff;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s;
    text-shadow: 0 0 5px rgb(210 0 255 / 70%);
}

.skill-button:hover:not(:disabled) {
    background-color: #330030;
    box-shadow: 0 0 10px rgb(255 0 241 / 50%);
}

.skill-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.skill-button.unlocked {
    background-color: #630066;
    color: #de75ff;
    box-shadow: 0 0 15px rgb(199 0 255 / 70%);
}

.skill-button.locked {
    background-color: #1a1a1a;
    color: #4d4d4d;
    border-color: #4d4d4d;
}

.completion-message {
    background-color: #1e1e1e;
    border: 2px solid #00ffff;
    border-radius: 10px;
    padding: 15px;
    margin-top: 20px;
    text-align: center;
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.3);
}

.completion-message h3 {
    color: #00ffff;
    margin-top: 0;
    text-shadow: 0 0 10px rgba(0, 255, 255, 0.7);
}

.game-completion {
    background-color: #006666;
    color: #00ffff;
    border: 2px solid #00ffff;
    box-shadow: 0 0 30px rgba(0, 255, 255, 0.5);
}

.game-completion h2 {
    color: #ffff00;
    margin-top: 0;
    text-shadow: 0 0 15px rgba(255, 255, 0, 0.7);
}

@keyframes growShrink {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.5); }
}

#result-text {
    font-size: 1.1rem;
    margin-bottom: 1rem;
    line-height: 1.5;
    color: #00ffff;
}

.result-item {
    margin-bottom: 0.5rem;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

.result-item.visible {
    opacity: 1;
    transform: translateY(0);
}

.xp-number {
    color: #02ff00;
    font-weight: bold;
    display: inline-block;
    text-shadow: 0 0 10px rgb(0 255 57 / 70%);
}

.xp-number.animate {
    animation: growShrink 0.5s ease-in-out;
}

@keyframes undulate {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.skill-button.available-skill {
    animation: undulate 1.5s ease-in-out infinite;
    box-shadow: 0 0 20px rgb(255 0 241 / 70%);
    border: 2px solid #ff00fa;
}

.skill-button.available-skill:hover {
    animation: none;
    transform: scale(1.05);
}

#confetti-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: 9999;
}

.confetti {
    position: absolute;
    width: 10px;
    height: 10px;
    background-color: #00ffff;
    clip-path: polygon(50% 0%, 0% 100%, 100% 100%);
    animation: fall linear forwards;
}

@keyframes fall {
    to {
        transform: translateY(100vh) rotate(720deg);
    }
}

#next-level-button {
    position: relative;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

#next-level-button::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(0,255,255,0.7) 0%, rgba(0,255,255,0) 70%);
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

#next-level-button:hover {
    transform: scale(1.05);
    box-shadow: 0 0 25px rgba(0, 255, 255, 0.7);
}

#next-level-button:hover::before {
    opacity: 1;
}

#next-level-button.pressed {
    transform: scale(0.95);
    box-shadow: 0 0 15px rgba(0, 255, 255, 0.5);
}

.spark-container {
    position: fixed;
    pointer-events: none;
    z-index: 9999;
}

.spark {
    position: absolute;
    width: 5px;
    height: 5px;
    background-color: #ff8d00;
    border-radius: 50%;
    opacity: 1;
    animation: spark-fly 0.5s ease-out forwards;
    box-shadow: 0 0 5px rgb(255 188 0 / 70%);
}

@keyframes spark-fly {
    0% {
        transform: translate(0, 0);
        opacity: 1;
    }
    100% {
        transform: translate(calc(cos(var(--angle)) * var(--speed)), calc(sin(var(--angle)) * var(--speed)));
        opacity: 0;
    }
}


/* ... (testing) */

.game-completion {
    background-color: #ffd700;
    color: #000;
    border: 3px solid #ff8c00;
    box-shadow: 0 0 20px rgba(255, 215, 0, 0.5);
    animation: pulse 2s infinite;
}

.game-completion h2 {
    color: #ff4500;
    font-size: 1.8em;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
}

@keyframes pulse {
    0% {
        box-shadow: 0 0 20px rgba(255, 215, 0, 0.5);
    }
    50% {
        box-shadow: 0 0 40px rgba(255, 215, 0, 0.8);
    }
    100% {
        box-shadow: 0 0 20px rgba(255, 215, 0, 0.5);
    }
}